10:26-31 The exhortations against apostacy and to perseverance, are urged by many strong reasons. The sin here mentioned is a total and final falling away, when men, with a full and fixed will and resolution, despise and reject Christ, the only Saviour; despise and resist the Spirit, the only Sanctifier; and despise and renounce the gospel, the only way of salvation, and the words of eternal life. Of this destruction God gives some notorious sinners, while on earth, a fearful foreboding in their consciences, with despair of being able to endure or to escape it. But what punishment can be sorer than to die without mercy? We answer, to die by mercy, by the mercy and grace which they have despised. How dreadful is the case, when not only the justice of God, but his abused grace and mercy call for vengeance! All this does not in the least mean that any souls who sorrow for sin will be shut out from mercy, or that any will be refused the benefit of Christ's sacrifice, who are willing to accept these blessings. Him that cometh unto Christ, he will in no wise cast out.

For we know him that hath said,.... That is, God, whom the apostle and the Hebrews knew; not merely by the works of creation and providence, but by the Scriptures, which they were favoured with, and by which they were distinguished from the Gentiles, and by which they knew his being, nature, and perfections; particularly, that what he said he was able to perform, and that he was true and faithful to every word of his, and to what he has said, Deuteronomy 32:35

vengeance belongeth unto me, I will recompence, saith the Lord. Vengeance belongs to God, not as to the affection, as if there was any such passion in him; but as to the effect, there being that produced by him, which answers to the effect of such a passion among men, namely punishment: and punishment for sin belongs to God, against whom it is committed; and not to Heathen deities, one of which goes by the name of Vengeance, Acts 28:4 nor to Satan, and his spiteful angels; nor to men, to exercise it in a private and personal way; though civil magistrates, being in God's stead, are allowed to exercise it in a public way, according to the laws of God: and there is good reason to believe, that what the Lord here says, "I will recompence", or revenge sin, shall be done; which may be concluded from his hatred of sin; from his purity, holiness, and justice; from his faithfulness to his word; from his omnipotence; from the notice he takes of sin, in his own people, in a way of chastisement, and correction; and from the vengeance he has poured on his own Son, as their surety.

And again, in Deuteronomy 32:36 the Lord shall judge his people; such as are truly so, his chosen and covenant people, his redeemed and called ones; these he judges by chastising them in a fatherly way, that they may not be condemned with the world; and by governing and protecting them; and by vindicating and pleading their cause, and avenging them on their enemies: or else such as are only his people by profession; on these he will write a "Lo-ammi"; he distinguishes them from his own, and judges between them and his people, and will condemn them; nor will their profession screen them from his wrath and vengeance.

Lord shall judge his people—in grace, or else anger, according as each deserves: here, "judge," so as to punish the reprobate apostate; there, "judge," so as to interpose in behalf of, and save His people (De 32:36).

A Call to Persevere…29How much severer punishment do you think he will deserve who has trampled under foot the Son of God, and has regarded as unclean the blood of the covenant by which he was sanctified, and has insulted the Spirit of grace? 30For we know Him who said, "VENGEANCE IS MINE, I WILL REPAY." And again, "THE LORD WILL JUDGE HIS PEOPLE."31It is a terrifying thing to fall into the hands of the living God.…

Cross References

Leviticus 19:18"'Do not seek revenge or bear a grudge against anyone among your people, but love your neighbor as yourself. I am the LORD.

Deuteronomy 32:35It is mine to avenge; I will repay. In due time their foot will slip; their day of disaster is near and their doom rushes upon them."

Deuteronomy 32:36The LORD will vindicate his people and relent concerning his servants when he sees their strength is gone and no one is left, slave or free.

1 Samuel 25:26And now, my lord, as surely as the LORD your God lives and as you live, since the LORD has kept you from bloodshed and from avenging yourself with your own hands, may your enemies and all who are intent on harming my lord be like Nabal.

1 Samuel 26:10As surely as the LORD lives," he said, "the LORD himself will strike him, or his time will come and he will die, or he will go into battle and perish.

Romans 12:19Do not take revenge, my dear friends, but leave room for God's wrath, for it is written: "It is mine to avenge; I will repay," says the Lord.

Treasury of Scripture

For we know him that has said, Vengeance belongs to me, I will recompense, said the Lord. And again, The Lord shall judge his people.